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Add crude color management impl for cairo

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This commit is contained in:
Benjamin Otte
2021-09-26 02:44:54 +02:00
committed by Matthias Clasen
parent f8157abd4b
commit 41527b50ab
1 changed files with 71 additions and 4 deletions
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75
gsk/gskcairorenderer.c
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@@ -1,5 +1,5 @@
/*
* Copyright © 2016 Endless
* Copyright © 2016 Endless
* 2018 Benjamin Otte
*
* This library is free software; you can redistribute it and/or
@@ -25,6 +25,9 @@
#include "gskdebugprivate.h"
#include "gskrendererprivate.h"
#include "gskrendernodeprivate.h"
#include "gdk/gdkcolorprofileprivate.h"
#include "gdk/gdkmemorytextureprivate.h"
#include "gdk/gdktextureprivate.h"
#ifdef G_ENABLE_DEBUG
@@ -40,6 +43,7 @@ struct _GskCairoRenderer
GdkCairoContext *cairo_context;
gboolean color_managed;
#ifdef G_ENABLE_DEBUG
ProfileTimers profile_timers;
#endif
@@ -78,8 +82,8 @@ gsk_cairo_renderer_do_render (GskRenderer *renderer,
cairo_t *cr,
GskRenderNode *root)
{
#ifdef G_ENABLE_DEBUG
GskCairoRenderer *self = GSK_CAIRO_RENDERER (renderer);
#ifdef G_ENABLE_DEBUG
GskProfiler *profiler;
gint64 cpu_time;
#endif
@@ -104,6 +108,7 @@ gsk_cairo_renderer_render_texture (GskRenderer *renderer,
GskRenderNode *root,
const graphene_rect_t *viewport)
{
GskCairoRenderer *self = GSK_CAIRO_RENDERER (renderer);
GdkTexture *texture;
cairo_surface_t *surface;
cairo_t *cr;
@@ -127,7 +132,7 @@ gsk_cairo_renderer_render_texture (GskRenderer *renderer,
{
for (x = 0; x < width; x += MAX_IMAGE_SIZE)
{
texture = gsk_cairo_renderer_render_texture (renderer, root,
texture = gsk_cairo_renderer_render_texture (renderer, root,
&GRAPHENE_RECT_INIT (x, y,
MIN (MAX_IMAGE_SIZE, viewport->size.width - x),
MIN (MAX_IMAGE_SIZE, viewport->size.height - y)));
@@ -145,6 +150,9 @@ gsk_cairo_renderer_render_texture (GskRenderer *renderer,
}
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
if (self->color_managed)
gdk_cairo_surface_set_color_profile (surface, gdk_color_profile_get_srgb_linear ());
cr = cairo_create (surface);
cairo_translate (cr, - viewport->origin.x, - viewport->origin.y);
@@ -189,7 +197,64 @@ gsk_cairo_renderer_render (GskRenderer *renderer,
}
#endif
gsk_cairo_renderer_do_render (renderer, cr, root);
if (!self->color_managed ||
gdk_color_profile_is_linear (gdk_cairo_get_color_profile (cr)))
{
gsk_cairo_renderer_do_render (renderer, cr, root);
}
else
{
GdkSurface *surface = gsk_renderer_get_surface (renderer);
GdkColorProfile *target_profile = gdk_cairo_get_color_profile (cr);
cairo_surface_t *cairo_surface;
cairo_t *cr2;
GdkTexture *color_correct;
const cairo_region_t *frame_region;
cairo_rectangle_int_t extents;
guint i, n;
frame_region = gdk_draw_context_get_frame_region (GDK_DRAW_CONTEXT (self->cairo_context));
cairo_region_get_extents (frame_region, &extents);
/* We can't use cairo_push_group() here, because we'd lose the
* color profile information.
*/
cairo_surface = gdk_surface_create_similar_surface (surface,
CAIRO_CONTENT_COLOR_ALPHA,
extents.width,
extents.height);
gdk_cairo_surface_set_color_profile (cairo_surface,
gdk_color_profile_get_srgb_linear ());
cr2 = cairo_create (cairo_surface);
cairo_translate (cr2, -extents.x, -extents.y);
gdk_cairo_region (cr2, frame_region);
cairo_clip (cr2);
gsk_cairo_renderer_do_render (renderer, cr2, root);
cairo_destroy (cr2);
color_correct = gdk_texture_new_for_surface (cairo_surface);
cairo_surface_destroy (cairo_surface);
n = cairo_region_num_rectangles (frame_region);
for (i = 0; i < n; i++)
{
cairo_rectangle_int_t rect;
GdkTexture *sub;
cairo_region_get_rectangle (frame_region, i, &rect);
rect.x -= extents.x;
rect.y -= extents.y;
sub = gdk_memory_texture_new_subtexture (GDK_MEMORY_TEXTURE (color_correct),
rect.x, rect.y, rect.width, rect.height);
cairo_surface = gdk_texture_download_surface (sub, target_profile);
cairo_set_source_surface (cr, cairo_surface, rect.x + extents.x, rect.y + extents.y);
cairo_paint (cr);
cairo_surface_destroy (cairo_surface);
g_object_unref (sub);
}
g_object_unref (color_correct);
}
cairo_destroy (cr);
@@ -210,6 +275,8 @@ gsk_cairo_renderer_class_init (GskCairoRendererClass *klass)
static void
gsk_cairo_renderer_init (GskCairoRenderer *self)
{
self->color_managed = TRUE;
#ifdef G_ENABLE_DEBUG
GskProfiler *profiler = gsk_renderer_get_profiler (GSK_RENDERER (self));